Rod-elevator



R. C. McMlCHAEL.

ROD ELEVATOR.

APPLICATION FILED APR.15. 1920.

1,367,273. Emma Feb. 1,1921. 5 2,.1

IN VEN TOR. WK (m ma.

Kiln-4M ATTORNEY UNITED STATES PATENT OFFICE.

ROBERT C. MOMICHAEL, OF BICKNELL, CALIFORNIA.

non-ELEVATOR.

Application filed April 15, 1920. Serial No. 374,210.

I! "0 all 20 hom it may concern Be it known that I, Ronnn'r C. MCMIGHAEL, a citizen of the United States, residing at Bicknell, in the county of Santa Barbara and State of California, have invented new and useful Rod-Elevators, of which the following is a specification.

My invention relates to rod elevators and is more particularly directed to an elevator adapted for use for elevating or lowering oil well sucker-rods.

The object of the invention is to provide a sucker-rod elevator of simple anddurable construction which may be engaged with a sucker rod and then turned to a position in which said rod is prevented from being disengagedduring the raising or lowering of the rod.

Another object is to provide such an eleva tor having means to prevent a tilting of the rod in the elevator when supported thereby.

Aqturther object is to provide asuckerrod elevator formed of a Sll'lgl piece of material and a supporting bail and having a rod receiving throat angled to the vertical axis of the elevator by which the elevator is engaged with the rod in an angled position and then turned to a lifting position for subsequent raising or lowering of the rod.

Various other objects and advantages will be more fully apparent from the following description of the accompanying drawings which form a part of this disclosure, and which illustrates a preferred form of1em" bodiment of the invention.

Oil the drawings:

Figure 1 is a side elevation of the elevator supporting a sucker-rod and resting on the top of a well tubing. i

Fig. 2 is a top plan view of the elevator.

Fig. ,3 is a vertical section on line xv -m of Fig. 1. i Fig. 4; is a vertical section on line m -aif of Fig. 2.

Fig. 5 is. aside elevation, indicating in dotted lines the first or angled position of the elevator in its engagement with-a rod and showing in full lines the second posi tion thereof before being elevated to engage the shoulder of the rod.

In providing an elevator of the general type herein disclosed'it is-of great importance that it be of exceedingly simple and durable construction and at the :same'time be proof against disengagement with the rod during its manipulation-thereof.

As the weight of the rods may, in the case of deep wells, be in excess of3000 pounds, a slipping or accidental disengagement ofthe elevator would bring disastrous results; therefore it is of vital importance that the elevator be so constructed as to make such disengagement impossible while the elevator is supporting the rod.

In the present invention the elevator is so constructed as to obviate anyaccidental disengagement from the rod, as will be pointed out more specifically in the detailed description of the drawings, in which, 1 designates the body portion of the elevator which is provided with opposed trunnions 2-,2 at tording a pivotal connection of said body portion in'the opposed limbs of a bail 3. In use the bail is engaged by suitable lifting tackle as part of an oil well equipmenaior raising or lowering the engaged rod out of or into the well tubing. l

The body of the elevator has a central bore 5 and an angled slot extending inwardly through the sidewall of thebody and intersecting said bore, providing rod receivin throat 6. Above and below the point of suc intersecting of the slot and bore, the slot extends radially in opposite directions lnerg" ing with the bore to provide opoosed radial passages 7-7 (see Figs. 2 and Vhen in rod supporting position the elevator body engages beneath the shoulder formed by the enlarged end 9 of" therod 1.0, and to prevent lateral or tilting movement of the elevator on the rod, the opposed surfaces of the body are provided with recesses S--8 concentric with and adjacent central bore 5 and forming pockets, the enlarged end 9 of the rod seating in one or the other of said recesses depending upon which surface of the body is facing upwardly.

While I have illustrated the elevator as being provided with the pockets 8,- and while this-construction isdesirable when the device is intended to *oooperatewith rods having a standardsize of enlarged end 9, the most desirable construction would be one which will be adaptable to cooperate with rods having various sizes and shapes of ends, therefore as there are in general use many different forms of sucker rods, I contemplate the making of the present elevator without the pockets 8 to supply the trade with a device universally adaptable for general use on all types of sucker rods. In this form thedevice will operate with pen manipulated.

feet safety and may be more speedily With special reference to Fig. 1, attention is directed to the angular plane of the receiving throat 6 which intersects the bail limb at a point closely adjacent the body, said throat terminating at opposite sides of the vertical bore and with the opposite radial slots or passages 7-7 defining oppositely disposed tangs 11l1 extending across the vertical bore. These tangs confine the rod at the top and bottom of the body and within the radial passages until said rod is in alinement with the receiving throat 6, and as the angular plane of the throat 6 intersects the bail limb closely adjacent the body the tilting movement is limited to the degree illustrated in dotted lines in Fig. 1, so long as the bail is vertically extended in position of use. This limit of tilting movement is due to the head 9 of the rod contacting with the bail limb before the rod reaches a. point of alinementwith the receiving throat 6, and while in this tilted position the tangs 11-11 still overlap the rod and maintain itconfined within the radial passages. It is therefore evident that the rod is confined against displacement at all times in which the bail is vertically disposed.

It will be noted that the shape of the elevatorbody and its rod receiving throat, bore and radial passages isthe same on each side of the trunnion'axis, thereby forming a universal fitting adapted to engage the rod from either side.

In operation, the elevator is first tilted to the position indicated in dotted lines in Fig. 5, with the rod receiving throat 6 alined with the rod, and then engaged over the rod, the rod entering the receiving throat. The elevator is then tilted back to horizontal position as shown in full lines in said figure, the rod passing through the radial passages 7 and into alinement with the central bore 5 after which the elevator is raised, en-

gaging beneath the enlarged end of the rod with said end resting in one of the recesses or pockets 8, as shown in Fig. 3.

When desired the elevator may be lowered to rest upon the well tubing 15 as shown in Fig. 1, supporting the rod within the well independently of the bail. V

' With a rod elevator constructed as above described said elevator cannot be disengaged from the rod while in its operating position but must first be relieved of the weight of the rod,lowered to disengage the shoulder of the enlarged end of the rod' from the shoulder receiving recess or pocket and then tilted to bring the rod receiving throat in alinem'ent with the rod after which the elevator may be drawn sidewise free of the rod. V

This structure provides a simple and tinrahle elevator which is proof against dis placement during a manipulation of a sucker-rod, which is convenient to apply to and remove from the rod and which is exceedingly cheap to manufacture.

I claim:

1. A rod elevator comprising a body having a vertical bore and an angled rod reeei ving throat intersecting the medial portion of said bore.

2. A rod elevator comprising a body having a vertical bore and an angled rod receiving throat intersecting the medial portion of said bore and radial passages connecting the opposite ends of the bore and throat.

3. A rod elevator comprising a body having a vertical bore and an angled rod receiving throat intersecting the medial poition of said bore, said body having a pocket adjacent to and concentric with the bore and radial passages connecting the opposite ends of the bore and throat.

' 1. A red elevator comprising a bail, and a body horizontally pivoted in said bail and having a vertical bore and an angled transverse rod receiving throat intersecting the medial portion of the bore.

5. A rod elevator comprising a body having horizontal disposed trunnions, and a bail journaled on said trunnions. the body l1aving a central vertical bore and an angled transverse rod receiving throat intersecting the medial portion of the bore.

6. A rod elevator comprising a body having a central vertical bore providing op posed pockets, an angled transverse rod receiving throat intersecting said bore at approximately its horizontal center, and opposed radial passages connecting the opposite ends of the throat and bore, and a bail horizontally pivoted to the body.

7 A rod elevator comprising a. body having horizontally alined opposed trunnions. and a bail pivotally journaled on said (runnions, the body having a vertical bore and an angled transverse rod receiving throat extended inwardly to intersect the medial portion of the bore, and opposed radial passages disposed at right angles to the transverse plane of the throat and connecting the opposite ends of said throat with the bore.

8. A rod elevator comprising a body having opposed horizontally alined trnnnions. and a bail pivotally journaled on said trunnions, the body having a vertical bore and an angled rod-receiving throat inwardly extended in a plane at right angles to the trunnion axis to intersect the medial portion of the bore, and radial passages extending in a plane coincident to said trunnion axis and connecting the opposite ends of the said throat and bore.

9. A rod elevator comprising, a body having a vertical bore, a transverse angled rod receiving throat intersecting the medial per,

llfi

tion of the bore, and radial connecting passages connecting the opposite ends of the throat and vertical bore and providing oppositely disposed tangs extending across the bore at the terminal ends thereof.

10. A red elevator comprising a body having a vertical central bore, a transverse angled rod receiving throat intersecting the medial portion of the bore and extending in opposite directions away from the bore, and radial passages disposed on opposite sides of the bore, each connecting one end of the throat ,With the adjacent end of the bore and providing a tang extending across the bore. a

11. A rod elevator comprising a body having a central vertical bore and a transverse angled rod receiving throat extending across the bore and inwardly to intersect the medial portion of the bore, said throat terminating on opposite sides of the bore and at opposite horizontal sides of the body and closely adjacent the vertical sides of the body, and radial vertical passages each disposed on 0pposite sides of the bore and connecting the ends thereof With the ends of the throat, providing oppositely projecting tangs extending across the top and bottom portions of the bore.

Signed at Bicknell, California, this 3d day of April,-1920.

ROBERT C. MonllOHAEL.

Witnesses MAn'rnoN JONES, R. C. JENSEN. 

